Scorpion, shark, and bat exhibit which type of body symmetry?

The type of symmetry in which the body of an animal can be divided into two identical left and right halves by only one plane is called:

How useful is the study of the nature of body cavity and coelom in the classification of animals?

Identify the type of symmetry in the given figures.

Aristotle classified animals into two groups based on the presence or absence of $RBC$. The group which does not have $RBCs$ is:

Assertion $A$: Annelids and Arthropods exhibit bilateral symmetry.
Reason $R$: In Annelids and Arthropods,the animal body is divided into equal parts along radial directions.
Which option is correct for Assertion $A$ and Reason $R$?